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AssigneeFORMA Therapeutics, Inc.
InventorsAlex J. Buckmelter, Justin Andrew Caravella, Hongbin Li, Matthew W. Martin, Steven Mischke, David James Richard, Angela V. West
Estimating the term…
The disclosure relates to USP30 Inhibitor Compounds I, pharmaceutically acceptable salts thereof, pharmaceutical compositions comprising same, and medical uses involving same. (I)
A compound of formula (I):
A compound, or pharmaceutically acceptable salt thereof, selected from:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
In which the condensed system contains three hetero rings: bridged systems
Drugs for disorders of the nervous system
For treating abnormal movements, e.g. chorea, dyskinesia: anti-Parkinson drugs
Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a…:…
About 12 years 11 months of term left · ends 4 Oct 2039 (estimated)
This disclosure relates to inhibiting Ubiquitin-Specific Protease 30 (USP30), including novel compounds and methods for inhibiting USP30. The compounds and related methods are useful in the field of medicine including the development of new therapies (e.g., for the treatment of conditions related to the therapeutic inhibition of USP30 such as Parkinson's Disease (PD)).
The ubiquitination system is a highly regulated process which affects a wide variety of cellular activities and physiological processes. Ubiquitination is a reversible process, facilitated by a group of proteins known as deubiquitinating enzymes (DUBs), which deconjugate ubiquitin (Ub) from the substrate. DUBs are encoded by approximately 100 human genes and are divided into six families, with the largest family being the ubiquitin-specific proteases (USPs) with more than 50 members.
Ubiquitination regulates mitochondrial dynamics and biogenesis, affecting the abundance and function of these organelles. Mitochondria serve many functions to maintain cell health in mammals, including generating ATP. As mitochondria age they become damaged, losing their metabolic functionality, and begin releasing pro-apoptotic proteins. Mitochondria self-regulate their quality via the mechanism of mitophagy, which is the selective removal of damaged mitochondria from the cell. Ubiquitination of mitochondrial proteins is believed to contribute to mitochondrial dynamics in mammalian cells, possibly by “flagging” those proteins for inactivation. Ubiquitin-Specific Protease 30 (USP30) is embedded in the outer membrane of mitochondria, where it participates in the maintenance of mitochondrial morphology. It is believed that over-expression of USP30 can lead to a decrease in mitophagy.
The present disclosure relates to compounds of formula (I), as defined herein, pharmaceutically acceptable salts thereof, pharmaceutical compositions comprising same, and medical uses involving same. In some embodiments, the compounds of formula (I) are USP30 Inhibitor Compounds. In other embodiments, the compounds of formula (I) are useful, for example, as analytical tools and/or control compounds in biological assays (e.g., compounds of any of the following aspects and embodiments that are not USP30 Inhibitor Compounds).
USP30 Inhibitor Compounds are useful in the development of new therapies for Parkinson's disease (PD), and in methods of treating diseases or conditions by inhibiting USP30 (such as PD). Parkin (E3 ubiquitin ligase) and PINK1 (kinase) are key regulators of mitophagy. In healthy mitochondria, PINK1 localization to the mitochondrial outer membrane (MOM) and exposure to the cytosol is limited by rapid import to the mitochondrial inner membrane (MIM). Once localized to the MIM, PINK1 is processed by several proteases, such as presenilin associated rhomboid-like protease (PARL), to yield a truncated version of PINK1 which is subsequently degraded by the proteasome (Meissner et al., Autophagy. 2015, 11(9), 1484-1498). Upon mitochondrial depolarization or dysfunction, PINK1 accumulates in the MOM, recruiting and activating Parkin via PINK1-dependent phosphorylation of both ubiquitin and Parkin. Consequently, activated Parkin ubiquitinates MOM proteins like TOMM20 to trigger mitophagy (Pickrell et al., Neuron. 2015, 85(2), 257-273). USP30 is embedded in the MOM with its catalytic DUB domain oriented towards the cytosol and has been shown to antagonize Parkin-mediated ubiquitination of common substrates, consequently opposing Parkin-mediated mitophagy. Genetic silencing of USP30 results in increased ubiquitination of several Parkin substrates followed by increased mitophagy. In model organisms, USP30 depletion is able to rescue mitophagy defects caused by pathogenic Parkin mutations, as well as restore mitochondria morphology and function, and dopamine levels. (Nakamura, et al., Mol Biol Cell. 2008, 19(5), 1903-1911; Bingol, et al., Nature 2014, 510(7505):370-5). Therefore, inhibition of USP30 with a compound disclosed herein could present a novel treatment paradigm for PD by promoting mitochondrial turnover.
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